Linux Shell脚本之自动修改IP

作为一名Linux SA，日常运维中很多地方都会用到脚本，而服务器的ip一般采用静态ip或者MAC绑定，当然后者比较操作起来相对繁琐，而前者我们可以设置主机名、ip信息、网关等配置。修改成特定的主机名在维护和管理方面也比较方便。如下脚本用途为：修改ip和主机名等相关信息，可以根据实际需求修改，举一反三！

1. #!/bin/sh
2. #auto Change ip netmask gateway scripts
3. #wugk 2012-12-17
4. cat << EOF
5. ++++++++自动修改ip和主机名等相关信息+++++++++
6. ETHCONF=/etc/sysconfig/network-scripts/ifcfg-eth0
7. HOSTS=/etc/hosts
8. NETWORK=/etc/sysconfig/network
9. DIR=/data/backup/`date +%Y%m%d`
10. NETMASK=255.255.255.0
11. +++++++++-------------------------+++++++++++
12. EOF
13. #Define Path 定义变量，可以根据实际情况修改
15. ETHCONF=/etc/sysconfig/network-scripts/ifcfg-eth0
16. HOSTS=/etc/hosts
17. NETWORK=/etc/sysconfig/network
18. DIR=/data/backup/`date +%Y%m%d`
19. NETMASK=255.255.255.0
21. echo "================================================"
22. echo
23. #定义change_ip函数
24. function Change_ip ()
25. {
26. #判断备份目录是否存在，中括号前后都有空格，！叹号在shell表示相反的意思#
27. if
28. [ ! -d $DIR ];then
30. mkdir -p $DIR
32. fi
34. echo "Now Change ip address ,Doing Backup Interface eth0"
35. cp $ETHCONF $DIR
37. grep "dhcp" $ETHCONF
38. #如下$?用来判断上一次操作的状态，为0，表示上一次操作状态正确或者成功#
39. if
41. [ $? -eq 0 ];then
42. #read -p 交互输入变量IPADDR，注冒号后有空格，sed -i 修改配置文件#
43. read -p "Please insert ip Address:" IPADDR
44. sed -i 's/dhcp/static/g' $ETHCONF
45. #awk -F. 意思是以.号为分隔域，打印前三列#
46. echo -e "IPADDR=$IPADDR/nNETMASK=$NETMASK/nGATEWAY=`echo $IPADDR|awk -F. '{PRint $1"."$2"."$3}'`.254" >>$ETHCONF
47. echo "This IP address Change success !"
49. else
51. echo -n "This $ETHCONF is static exist ,please ensure Change Yes or NO":
52. read i
54. fi
56. if
57. [ "$i" == "y" -o "$i" == "yes" ];then
58. read -p "Please insert ip Address:" IPADDR
60. count=(`echo $IPADDR|awk -F. '{print $1,$2,$3,$4}'`)
61. #定义数组， ${#count[@]}代表获取变量值总个数#
62. A=${#count[@]}
63. #while条件语句判断，个数是否正确，不正确循环提示输入，也可以用[0-9]来判断ip#
64. while
66. [ "$A" -ne "4" ]
68. do
70. read -p "Please re Inster ip Address,example 192.168.0.11 ip": IPADDR
71. count=(`echo $IPADDR|awk -F. '{print $1,$2,$3,$4}'`)
72. A=${#count[@]}
74. done
75. #sed -e 可以连续修改多个参数#
76. sed -i -e 's/^IPADDR/#IPADDR/g' -e 's/^NETMASK/#NETMASK/g' -e 's/^GATEWAY/#GATEWAY/g' $ETHCONF
77. #echo -e /n为连续追加内容，并自动换行#
78. echo -e "IPADDR=$IPADDR/nNETMASK=$NETMASK/nGATEWAY=`echo $IPADDR|awk -F. '{print $1"."$2"."$3}'`.254" >>$ETHCONF
79. echo "This IP address Change success !"
80. else
81. echo "This $ETHCONF static exist,please exit"
82. exit $?
84. fi
85. }
86. #定义hosts函数
87. ############function hosts##############
88. function Change_hosts ()
89. {
91. if
93. [ ! -d $DIR ];then
94. mkdir -p $DIR
96. fi
98. cp $HOSTS $DIR
99. read -p "Please insert ip address": IPADDR
101. host=`echo $IPADDR|sed 's//./-/g'`
102. cat $HOSTS |grep 127.0.0.1 |grep "$host"
104. if
105. [ $? -ne 0 ];then
106. sed -i "s/127.0.0.1/127.0.0.1 $host/g" $HOSTS
107. echo "This hosts change success "
109. else
110. echo "This $host IS Exist .........."
112. fi
113. }
115. ###########fuction network###############
116. #定义network函数
117. function Change_network ()
118. {
119. if
121. [ ! -d $DIR ];then
122. mkdir -p $DIR
124. fi
125. cp $NETWORK $DIR
126. read -p "Please insert ip address": IPADDR
128. host=`echo $IPADDR|sed 's//./-/g'`
129. grep "$host" $NETWORK
131. if
132. [ $? -ne 0 ];then
133. sed -i "s/^HOSTNAME/#HOSTNAME/g" $NETWORK
134. echo "NETWORK=$host" >>$NETWORK
136. else
137. echo "This $host IS Exist .........."
139. fi
141. }
142. #PS3一般为菜单提示信息#
143. PS3="Please Select ip or hosts Menu":
144. #select为菜单选择命令，格式为select $var in ..command.. do .... done
145. select i in "Change_ip" "Change_hosts" "Change_network"
146. do
147. #case 方式，一般用于多种条件下的判断
148. case $i in
149. Change_ip )
150. Change_ip
151. ;;
152. Change_hosts )
153. Change_hosts
154. ;;
155. Change_network )
156. Change_network
157. ;;
158. *)
159. echo
160. echo "Please Insert $0: Change_ip(1)|Change_hosts(2)|Change_network(3)"
161. echo
162. ;;
163. esac
164. done